Envelop.



E. H. MOORE.

ENVELOP.

APPLICATION FILED JAN. 28. 1916'.

Patented Apr. 3, 1917.

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' UNITED STATES PATENT ornrcn.

ESSIE I-I. Moons, or PITTSBURG, TEXAS.

ENVELOP.

Application filed January 28, 1916.

To all whom it may concern:

Be it known that I, ESSIE H. Moonn, a citizen of the United States, residing at Pittsburg, in the county of Camp and State of Texas, have invented new and useful Improvements in Envelops, of which the following is a specification.

An object of the invention is to provide a simple envelop which can be cheaply manufactured. and which cannot be fraudulently tampered with or opened for the purpose of removing its contents without mutilating or injuring the envelop to an extent which would be noticeable to the person to whom the envelop is addressed upon the subsequent receipt of the envelop by that person.

The invention contemplates, among other features, the provision of an envelop which is so arranged and constructed that it cannot be readily unsealed by the usual steaming process or the like and which, when once secured, cannot be fraudulently tampered with without injuring the envelop or mutilating the same to material extent.

In the further disclosure of the invention reference is to be had to the accompanying drawings, constituting a part of this specification, in which similar characters of reference denote corresponding parts in all the views, and in which:

Figure 1 is a view of the blank from which the envelop is formed;

Fig. 2 is a rear elevation of the envelop with the sealing flap secured;

Fig. 3 is a rear elevation of the envelop prior to securing the sealing flap;

Fig. 4 is a horizontal sectional view taken on the line 4-4 in Fig. 2; and

Fig. 5 is a vertical transverse sectional.

view taken on the line 55 in Fig. 3.

Referring more particularly to the views, I provide a blank 10 preferably made of paper or the like'and which is formed to provide a front 11, a back 12, sides 18 and 14 and a sealing flap 15. Each of the sides 13 and 14 has a flared extension 16 projecting therefromand formed by slitting the sides as indicated by the numeral 17, said extension for each side being adapted to project beyond the edge of the side and having its flared portion outermost. Similarly, the sealing flap 15 is provided with an extension 18 which is also flared and formed in substantially the same manner as the extensions 16 for the sides 13 and 14, said exten- Specification of Letters Patent.

Patented Apr. 3, 1917.

Serial No. 74,862. 1

sion 18 also projecting beyond the edge of the sealing flap.

Reinforcing tabs 19 are preferably formed on the back 12, being also formed with the sides 13, said reinforcing tabs being adapted to reinforce the corners of the envelop when the sides and back have been relatively folded, as will be readily seen. The end pieces 13 and 14 of the sides are coated with mucilage and the upper faces of the extensions 16, indicated by the numeral 16, are coated with mucilage. Similarly, the under side of the sealing flap 14, indicated by the numeral 15 is coated with mucilage and the face of the extension 18, indicated by the numeral 18*, is supplied with a coat of mucilage.

Now in forming the envelop the extensions 16 are first bent to lie beneath the back 12, previously bent rearwardly upon the front 11, the mucilage coated faces 16 of the extensions having been previously moistened so that the extensions will readily adhere to the under face of the back. The sides which, as noted, are each formed in two portions 20, by reason of the provision of the extensions for each side, are then bent rearwardly upon the back to lie against its outer face and adhere thereto and the envelop is now ready to receive the usual letter.

When the letter has been placed in the envelop the extension 18 having its face 18 coated with mucilage, is arranged to extend into the body of the envelop and adhere to the inner face of the back 12, with the sealing flap adapted to have its mucilage coated face 15 bear against the outer face of the back and against the outer faces or portions of the sides, thus sealing the envelop and securing its contents therein.

By having the envelop formed as mentioned it will be seen that the extensions 16 and 18 will lie beneath the back, whereas the sides 13 and 14 each having the extension 16 projecting therefrom will bear against the face of the back, and so also where the extension of the sealing flap lies beneath the back, the sealing flap thus bears against the outer face of the back, thus preventing the envelop from being opened by the usual steaming process for the reason that the steam process will not soften the mucilage or glue upon the faces of the extensions lying beneath the back.

From the foregoing description it will be clear that the envelop is economical of manufacture, it being made from a single piece of material and can be readily folded "for the desired purpose.

Having thus described my invention, I claim:

In an envelop, a blank formed to provide a front, a back, sides and a sealing flap, flared extensions formed with the sides by slitting the same, a portion of said extensions projecting beyond the edges of the sides, and a flared extension formed with the sealing flap and projecting beyond the edge of said sealing flap, the projecting edges of the said flared extensions being coated with a securing substance, said extensions of said sides and said sealing flap being adapted to lie beneath and having their projectin edges sealed to the said back when the bac is folded rearwardly upon the front, with the sides bearing against the back on its outer face and the said sealing flap bearing against the back on its outer face and against the portions of said edges, and reinforcements formed with the sides and back portions of the blank and serving to reinforce the corner portions of the envelop.

In testimony whereof I afiix my signature in presence of two witnesses.

ESSIE H. MOORE.

Witnesses:

G. \V. KEELING, C. F. MOORE.

Copies of this patent may be obtained for Ive cents each, by addressing the Commissioner of Intent, Washington, D. (3." 

